HSTS is HTTP Strict Transport Security, a means to enforce using SSL even if the user accesses the site through HTTP and not HTTPS.
More Plugins
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Auto Capitalize & UPPERCASE Names and Addresses
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Post Like Manager
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WP Over Network
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WP Content Experiments & Event Tracking
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Unofficial Yektanet
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Show Theme in Footer
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PDPA Consent for Thailand
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SEO GPT
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Author Box & Pages for E-E-A-T Optimization
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Pending Email SMTP
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SS Font Awesome Icon
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BlaatLogin: OAuth
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WP Videos
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Pretty RSS Feeds
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WP Simple Mail Sender
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Classic Editor and Classic Widgets
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Random File
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BP Profile Home Widgets
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AutoPost AI
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Vertical Image Menu